CN107900314A - The production technology of overall magnesium alloy chair framework - Google Patents
The production technology of overall magnesium alloy chair framework Download PDFInfo
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- CN107900314A CN107900314A CN201711451796.2A CN201711451796A CN107900314A CN 107900314 A CN107900314 A CN 107900314A CN 201711451796 A CN201711451796 A CN 201711451796A CN 107900314 A CN107900314 A CN 107900314A
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- magnesium alloy
- forging
- mould
- injection
- chair framework
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D18/00—Pressure casting; Vacuum casting
- B22D18/06—Vacuum casting, i.e. making use of vacuum to fill the mould
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
- B21J5/002—Hybrid process, e.g. forging following casting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
- B21J5/004—Thixotropic process, i.e. forging at semi-solid state
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
- B21J5/02—Die forging; Trimming by making use of special dies ; Punching during forging
- B21J5/025—Closed die forging
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/03—Making non-ferrous alloys by melting using master alloys
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C23/00—Alloys based on magnesium
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
- C25D11/02—Anodisation
- C25D11/30—Anodisation of magnesium or alloys based thereon
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Forging (AREA)
Abstract
The production technology of overall magnesium alloy chair framework, belong to chair framework manufacturing technology field, it includes instrument preparation, material preparation, joint control casting is forged, linkage is refined and surface treatment workshop section, lanthanide rare intermediate alloy is added in liquid magnesium alloy, and use particular manufacturing craft, vacuum injection is carried out at the same time from four direction, then casts and forges into line delay, then carry out trimming, differential arc oxidation and external coating and obtain overall magnesium alloy chair framework；Its advantage is to employ cerium agent magnesium alloy materials to make chair framework, can effectively reduce the weight of chair framework, increases substantially vibration and noise reducing, mechanical shock, falls, collides, extruding, overturning, radiating and the exterior comprehensive function characteristic such as burn；The shock resistance of chair framework and anti-surrender ability can be increased on the whole；Any surface finish, mechanical property are good.
Description
Technical field
The present invention relates to chair framework manufacturing technology field, particularly a kind of production of overall magnesium alloy chair framework
Technique.
Background technology
New-energy automobile is that substitution fuel-engined vehicle is most preferable, most promising green traffic instrument, with new-energy automobile
Rise, its relevant issues is increasingly valued by people.Course continuation mileage and vehicle weight have become the weight of new-energy automobile
Point problem.
At present, the chair framework of electric automobile generally uses carbon steel structure, is heavier chair framework.Magnesium alloy auto
Chair framework has the remarkable advantages such as density is small, security is high, and same volume magnesium alloy seat-weight is less than carbon steel structure seat
50%, it can effectively reduce the weight of automobile；Meanwhile high specific strength possessed by magnesium alloy and specific stiffness, high-damping, noise-and-vibration-reduction
Etc. characteristic, automobile vibration and noise can be effectively reduced, when automobile is hit, scattered more energy can be absorbed, and can
Protecting against shock is recessed, and makes automotive safety comfortable, and in addition die-casting process monolithic molding causes number of parts reduction, dimensional accuracy more
Height, production link are reduced, and optimize cost, therefore have the advantages that the traditional Chinese chair skeleton such as carbon steel, engineering plastics is incomparable.
The content of the invention
The technical problems to be solved by the invention be in order to mitigate the weight of automotive seat, and improve seat security and
A kind of comfort, there is provided chair framework made of magnesium alloy materials.
In order to solve the above technical problems, the technical solution adopted in the present invention is a kind of life of overall magnesium alloy chair framework
Production. art, the chair framework include integral seat basin skeleton and integral back skeleton, its production method includes instrument preparation, material
Preparation, joint control casting forging, linkage is refined and surface treatment workshop section, concrete technology step are as follows.
The instrument preparation workshop section includes (1) making casting forging mould and (2) die-filling.
The casting forging mould is made of moving-mould-core and cover half core, makes the dynamic model of seat basin skeleton and backrest frames respectively first
Core and cover half core, and cause the moving-mould-core and the mould cavity shape formed after the molding of cover half core and the seat basin in chair framework
The global shape of skeleton or backrest frames is identical.
It is described it is die-filling be by moving-mould-core be installed on casting forging hydraulic device dynamic model frame on, by cover half core be installed on casting forging hydraulic pressure
In the model frame of device；Restart the die cylinder of casting forging hydraulic device, promote moved cross beam, drive moving-mould-core downward stroke,
Molded with cover half core；The mould cavity formed after molding is evacuated again, mould cavity is become vacuum cavity, and
Make vacuum≤0.6Pa in vacuum cavity.
The material preparation workshop section includes (3) preheating, (4) melt and (5) batch mixing.
The preheating is that raw material magnesium alloy block is preheated 20-30min at a temperature of 190-210 DEG C first, then in 400-450
20-30min is preheated at a temperature of DEG C, and is kept the temperature.
The melt is using solvent-free gas shield and raw material magnesium alloy block is fused into magnesium at a temperature of 670-690 DEG C
Aluminium alloy is simultaneously kept the temperature.
The batch mixing is the lanthanide rare intermediate alloy that 2% parts by weight are added in liquid magnesium alloy, is then sufficiently stirred
Make to be uniformly mixed, obtain magnesium alloy liquid pressure, gas shield insulation is then carried out at a temperature of 665-675 DEG C.
Joint control casting forger section includes (6) cast, (7) vacuum injection, (8) delay casting forging and (9) mould unloading.
The cast is that magnesium alloy liquid pressure cast entered injection barrel, and when cast exists the temperature control of magnesium alloy liquid pressure
In the range of 665-675 DEG C.
The vacuum injection is that magnesium alloy liquid pressure injection is injected into casting forging mould vacuum cavity；Specifically start casting forging
The injection oil cylinder in four orientation in hydraulic device, promote four injection devices in injection punch head from four direction at the same time before
Into magnesium alloy liquid pressure injection being injected in the vacuum cavity of casting forging mould, and is molded；By the punch injection speed of magnesium alloy liquid pressure
Control is in the range of 185-215 mm/seconds, and injection power is controlled in the range of 2000-2200KN, and preferably injection power is 2110N.
The delay die forging is when magnesium alloy liquid pressure is full of the entirely mould cavity of casting forging mould, is slightly stopped, then
Forged.Specifically when magnesium alloy liquid pressure is full of the entirely mould cavity of casting forging mould, 10-80 milliseconds of stop, preferably 12
Millisecond；Restart the forging and stamping oil cylinder of casting forging hydraulic device, promote forging and stamping punch downlink, carry out closed die forging, and by forging force control
System is 9000KN in 8500-9500KN, preferably forging force, and forging time was controlled at 180-220 seconds, and forging and stamping Stroke Control is in 0-
1.8 millimeter.
The mould unloading is to cool down forging, opens mould, takes out forging, obtains blank magnesium and closes seat basin skeleton or by spine
Frame.Specifically forging is cooled to 380-400 DEG C, then starts forging and stamping oil cylinder and injection oil cylinder successively, exits forging and stamping punching
Head and injection punch head, restart die cylinder and separate moving-mould-core and cover half core, restart the ejection oil in casting forging hydraulic device
Cylinder, promotes mandril to eject the forging of casting and forging molding, then takes out forging, obtain blank magnesium alloy seat basin skeleton or by spine
Frame, is cast with several rivets on the blank magnesium alloy seat basin skeleton and blank magnesium alloy backrest frames.
The linkage refinement includes (10) detection, (11) trimming, (12) linkage motion cutting and (13) rivet hot.
The detection is that blank magnesium alloy seat basin skeleton or backrest frames are detected, and defective work is carried out place of doing over again
Reason, certified products are processed further；Specifically blank magnesium alloy chair framework is detected, there will be the hair of micropore or gap
Base magnesium alloy chair framework carries out reworked processing.
The trimming is to cool down certified products, trimming, obtains just base magnesium alloy seat basin skeleton or backrest frames.
The linkage motion cutting is that first base magnesium alloy chair framework is completed in clamped one time to institute by numer centre is organic
Tool is processed, and obtains smart base magnesium alloy seat basin skeleton or backrest frames.Specifically by qualified first base magnesium alloy seat basin skeleton or lean on
Spine frame stood by four axis or 5-shaft linkage numerical control center plus using dividing head and side milling head is completed in clamped one time it is organic
Tool manufacturing procedure, obtains smart base magnesium alloy seat basin skeleton or backrest frames.
The rivet hot is to be stitched together and be fixed on heat smart base magnesium alloy seat basin skeleton and smart base magnesium alloy backrest frames
On riveting tool, rivet rod is heated to 680 DEG C with high-frequency induction formula principle of heating, then rivet rod rotation is dropped into proper height by essence
Rivet rotary riveting shaping on base magnesium alloy seat basin skeleton, afterwards turns over workpiece, by the smart base magnesium alloy backrest frames rivet on opposite
Revolve riveting shaping.
The surface treatment workshop section includes (14) cleaning, (15) differential arc oxidation, (16) external coating.
The cleaning is that smart base magnesium alloy chair framework is carried out cleaning showers, is carried out clearly except degreasing, then with ultrasonic wave
Wash.
The differential arc oxidation is to insert smart base magnesium alloy chair framework in micro-arc oxidation electrolyte, carries out surface by micro-arc oxygen
Change is handled；Differential arc oxidation is specifically carried out in the electrolyte that voltage is 380V-420V to handle 8-12min minutes, makes differential of the arc oxygen
Change film layer and reach 13-16 μm.
The external coating is to carry out electrophoretic coating again after carrying out cleaning showers in the outer surface of micro-arc oxidation films or dust
Polishing treatment；Then cured after cleaning again, solidification temperature is 180-200 DEG C, hardening time 18-22min, obtains magnesium conjunction
Golden chair framework.
It is a kind of produce blank magnesium alloy chair framework casting forging hydraulic device, it is described casting forging hydraulic device be equipped with dynamic model,
Cover half, vacuum pumping hardware and injection mechanism；The dynamic model includes the dynamic model being fixed on the moved cross beam of casting forging hydraulic device
Frame and the forging and stamping punch for being arranged on dynamic model outer frame centre of surface, forge and press top and the forging and stamping oil cylinder of casting forging hydraulic device of punch
Piston rod connects, and the cover half includes the model frame being arranged on the workbench of casting forging hydraulic device, it is characterised in that described dynamic
Moving-mould-core is provided with framed, cover half core is equipped with the model frame；The moving-mould-core after cover half core molding with forming mould
Has cavity, the mould cavity shape is identical with the seat basin skeleton in chair framework or the shape difference of backrest frames；It is described fixed
Framed and cover half in-core is provided with mobilizable mandril, and the piston rod of the mandril and the ejection cylinder of casting forging hydraulic device connects
Connect；The vacuum pumping hardware includes vacuum exhauster, Vacuum exhaust tube and vacuum door close, and the vacuum exhauster is installed on
On workbench, the Vacuum exhaust tube connects mould cavity and vacuum exhauster with cover half core through model frame, and the vacuum is closed
Door is closed to be arranged in mould cavity wall；The top of the forging and stamping punch is equipped with 0-1.8 millimeters of forging and stamping stroke；The injection mechanism
Including four sets of injection devices, four sets of injection devices are separately positioned on four corners of model frame, and injection device includes injection barrel
And the injection punch head in injection barrel is arranged on, one end of the injection barrel is connected with mould cavity, the injection punch head
One end be connected with the piston rod of injection oil cylinder of casting forging hydraulic device.
The magnesium alloy materials that lanthanide rare intermediate alloy is added the beneficial effects of the invention are as follows use make chair framework,
The weight of chair framework can be effectively reduced, vibration and noise reducing, mechanical shock is increased substantially, falls, collides, extruding, overturning, dissipating
The comprehensive function characteristic such as heat and exterior baked wheaten cake；The unitary mould cavity of a basin skeleton or backrest frames is respectively adopted in the present invention, can
With globality by the seat basin skeleton or backrest frames casting and forging molding of magnesium alloy seat, it can so increase seat bone on the whole
The shock resistance of frame and anti-surrender ability；Vacuum injection combination center vacuum-pumping tube position and corner injection at the same time are used during cast,
It is possible to prevente effectively from Mg alloy castings produce micropore or gap, it is delayed later in cast and carries out joint control casting forging, can effectively carry
High die casting and forging precision, improve dense structure's degree, reduce micropore incidence；And any surface finish, mechanical property are good；Pass through head
Secondary preheating thoroughly removes moisture, is melted after preheating again, can effectively reduce the generation of segregation and shrinkage cavity.
Brief description of the drawings
Fig. 1 is the structure diagram of mould cavity and injection mechanism.
Fig. 2 is the structure diagram of casting forging hydraulic device.
In figure：1. the piston rod of dynamic model, 2. cover half, 3. injection mechanisms, 4. dynamic model frames, 5. forging and stamping punches, 6. forging and stamping oil cylinders,
7. model frame, 8. moving-mould-cores, 9. cover half cores, 10. mould cavities, 11. mandrils, the piston rod of 12. ejection cylinders, 13. vacuum are arranged
Tracheae, 14. injection devices, 15. injection barrels, 16. injection punch heads, the piston rod of 17. injection oil cylinders, 18. vacuum exhausters.
Embodiment
With reference to embodiment, the invention will be further described, and following embodiments are intended to illustrate invention rather than to this
The further restriction of invention, should not be limited the scope of the invention with this.
As shown in the figure, a kind of casting forging hydraulic device for producing blank magnesium alloy chair framework of installing, casting forging hydraulic device
It is equipped with dynamic model 1, cover half 2, vacuum pumping hardware and injection mechanism 3；The dynamic model 1 includes being fixed on the work of casting forging hydraulic device
Dynamic model frame 4 and the forging and stamping punch 5 for being arranged on dynamic model outer frame centre of surface on dynamic crossbeam, forge and press the top of punch 5 with casting forging liquid
The piston rod 6 of the forging and stamping oil cylinder of pressure device connects, and the cover half 2 includes the cover half being arranged on the workbench of casting forging hydraulic device
Frame 7, it is characterised in that moving-mould-core 8 is provided with the dynamic model frame 4, cover half core 9 is provided with the model frame 7；The dynamic model
Core 8 after the cover half core 9 molding with forming mould cavity 10, the shape of the mould cavity 10 and the mould cavity shape and seat
The shape difference of seat basin skeleton or backrest frames in skeleton is identical；It is provided with the model frame 7 and cover half core 9 movable
Mandril 11, the mandril 11 is connected with the piston rod 12 of ejection cylinder of casting forging hydraulic device；The vacuum pumping hardware bag
Vacuum exhauster 18, Vacuum exhaust tube 13 and vacuum door close are included, the vacuum exhauster 18 is installed on the table, described true
Idle discharge tracheae 13 connects mould cavity 10 and vacuum exhauster 18 with cover half core 9 through model frame 7, and the vacuum door close is set
In 10 wall of mould cavity；The top of the forging and stamping punch 5 is equipped with 0-1.8 millimeters of forging and stamping stroke；The injection mechanism 3 includes
Four sets of injection devices 14, four sets of injection devices 14 are separately positioned on four sides of model frame 7, and the injection device 14 includes pressure
Shooting cylinder 15 and the injection punch head 16 being arranged in injection barrel, one end of the injection barrel 15 are connected with mould cavity 10
Logical, one end of the injection punch head 16 is connected with the piston rod 17 of the injection oil cylinder of casting forging hydraulic device.
The production method of entirety magnesium alloy chair framework of the present invention, the chair framework include integral seat basin skeleton
With integral back skeleton, the production method includes instrument preparation, material preparation, joint control casting is forged, linkage is refined and surface treatment
Workshop section, concrete technology step are as follows successively.
(1) making casting forging mould, the casting forging mould are made of moving-mould-core 8 and cover half core 9, make moving-mould-core 8 first and determine
Core rod 9, and cause the moving-mould-core 8 and the seat in the shape and chair framework of the mould cavity 10 formed after the molding of cover half core 9
The global shape of basin skeleton or backrest frames is identical.
(2) it is die-filling, it is described it is die-filling be by moving-mould-core 8 be installed on casting forging hydraulic device dynamic model frame 4 on, cover half core 9 is installed
In the model frame 7 of casting forging hydraulic device；Restart the die cylinder of casting forging hydraulic device, promote moved cross beam, drive dynamic model
8 downward stroke of core, is molded with cover half core 9；Restart vacuum exhauster 18 to take out the mould cavity 10 formed after molding
Into vacuum, mould cavity 10 is become vacuum cavity, and make vacuum≤0.6Pa in vacuum cavity.
(3) preheat, raw material magnesium alloy block is preheated into 20-30min at 190-210 DEG C at a temperature of first, then in 400-450
20-30min is preheated at a temperature of DEG C, and is kept the temperature.
(4) melt, magnesium alloy is fused into using solvent-free gas shield at a temperature of 670-690 DEG C by raw material magnesium alloy block
Liquid is simultaneously kept the temperature.
(5) batch mixing, adds the lanthanide rare intermediate alloy of 2% parts by weight in liquid magnesium alloy, then be sufficiently stirred making
It is uniformly mixed, obtains magnesium alloy liquid pressure, gas shield insulation is then carried out at a temperature of 665-675 DEG C.
(6) pour into a mould, magnesium alloy liquid pressure cast is entered into injection barrel 15, when cast exists the temperature control of magnesium alloy liquid pressure
In the range of 665-675 DEG C.
(7) vacuum injection, is that magnesium alloy liquid pressure injection is injected into casting forging mould vacuum cavity；Specifically start casting forging
The injection oil cylinder in four orientation in hydraulic device, promote four injection devices 14 in injection punch head 16 from four direction at the same time
Advance, magnesium alloy liquid pressure injection is injected in the vacuum cavity of casting forging mould, and be molded；By the punch injection speed of magnesium alloy liquid pressure
Degree control is in the range of 185-215 mm/seconds, and injection power is controlled in the range of 2000-2200KN, and preferably injection power is 2110N.
(8) delay casting forging, when magnesium alloy liquid pressure is full of the entirely mould cavity of casting forging mould, slightly stops, then carries out
Forging；Specifically when magnesium alloy liquid pressure is full of the entirely mould cavity 10 of casting forging mould, 10-80 milliseconds are stopped, preferably 12 millis
Second；Restart the forging and stamping oil cylinder of casting forging hydraulic device, promote forging and stamping 5 downlink of punch, carry out closed die forging, and forging force is controlled
In 8500-9500KN, preferably forging force is 9000KN, and forging time was controlled at 180-220 seconds, and forging and stamping Stroke Control is in 0-1.8
Millimeter；
(9) mould unloading, forging is cooled down, and opens mould, is taken out forging, is obtained blank magnesium alloy chair framework.It is specifically that forging is cold
But 380-400 DEG C is cooled to, then starts forging and stamping oil cylinder and injection oil cylinder successively, exits forging and stamping punch 5 and injection punch head 16, then
Start die cylinder to separate moving-mould-core 8 and cover half core 9, restart the ejection cylinder in casting forging hydraulic device, promote mandril 11
The forging of casting and forging molding is ejected, forging is then taken out by robot, obtains blank magnesium alloy seat basin skeleton or backrest frames；Institute
State and be cast with multiple rivets on blank magnesium alloy seat basin skeleton and blank magnesium alloy backrest frames.
(10) detect, blank magnesium alloy seat basin skeleton or backrest frames be detected, defective work is subjected to reworked processing,
Certified products are processed further；Specifically blank magnesium alloy seat basin skeleton or backrest frames are detected, will have micropore or
The blank magnesium alloy seat basin skeleton or backrest frames in gap carry out reworked processing.
(11) trimming, is to cool down certified products, trimming, obtains just base magnesium alloy seat basin skeleton or backrest frames.
(12) linkage motion cutting, first base magnesium alloy seat basin skeleton or backrest frames are completed by numer centre in clamped one time
All mechanical processings, obtain smart base magnesium alloy seat basin skeleton or backrest frames.Specifically by qualified first base magnesium alloy seat basin bone
Frame or backrest frames are stood by four axis or 5-shaft linkage numerical control center plus are completed using dividing head and side milling head in clamped one time
All machining operations, obtain smart base magnesium alloy seat basin skeleton or backrest frames.
(13) rivet hot, is to be stitched together and be fixed on rivet hot smart base magnesium alloy seat basin skeleton and smart base magnesium alloy backrest frames
In frock, rivet rod is heated to 680 DEG C with high-frequency induction formula principle of heating, then rivet rod rotation is dropped into proper height by smart base
7,8,9 rivet rotary rivetings shaping on magnesium alloy seat basin skeleton, afterwards turns over workpiece, by the smart base magnesium alloy backrest frames on opposite
On 7,8,9 rivet rotary rivetings shaping.
(14) clean, smart base magnesium alloy seat basin skeleton or backrest frames are subjected to cleaning showers, except degreasing, then use ultrasonic wave
Cleaned.
(15) differential arc oxidation, smart base magnesium alloy seat basin skeleton or backrest frames are inserted in micro-arc oxidation electrolyte, carry out table
Surface by micro-arc oxidation processes；Specifically differential arc oxidation is carried out in the electrolyte that voltage is 380V-420V to handle 8-12min minutes,
Differential arc oxidation film layer is set to reach 13-16 μm.
(16) external coating, electrophoretic coating is carried out or polishing of dusting after carrying out cleaning showers in the outer surface of micro-arc oxidation films again
Processing；Then cured after cleaning again, solidification temperature is 180-200 DEG C, and hardening time 18-22min, obtains magnesium alloy seat
Basin skeleton or backrest frames.
Embodiment 1.
Moving-mould-core 8 is installed on the dynamic model frame 4 of casting forging hydraulic device, cover half core 9 is installed on casting forging hydraulic device
In model frame 7；Restart the die cylinder of casting forging hydraulic device, promote moved cross beam to drive 8 downward stroke of moving-mould-core, with cover half
Core 9 is molded；The mould cavity 10 after molding is evacuated again, mould cavity 10 is become vacuum cavity, and make vacuum
Vacuum≤0.2Pa in cavity.
National standard AZ91D magnesium ingots are preheated into 20min at 190 DEG C at a temperature of first, then 20min is preheated at a temperature of 400 DEG C,
And keep the temperature；Then raw material magnesium alloy block is fused into liquid magnesium alloy at a temperature of 670 DEG C and kept the temperature.
The lanthanide rare intermediate alloy of 2% parts by weight is added in liquid magnesium alloy, then carrying out being sufficiently stirred makes mixing equal
It is even, magnesium alloy liquid pressure is obtained, gas shield insulation is then carried out at a temperature of 665 DEG C.
Magnesium alloy liquid pressure cast is entered into injection barrel 15, by the temperature control of magnesium alloy liquid pressure is 665 DEG C during cast；So
Start the injection oil cylinder in four orientation in casting forging hydraulic device afterwards, the piston rod 17 of injection oil cylinder promotes four injection devices 14
In injection punch head 16 advance at the same time from four direction, by magnesium alloy liquid pressure injection inject casting forging mould vacuum cavity in, and
Shaping, the punch injection speed control of liquid magnesium alloy is 185 mm/seconds, and the control of injection power is 2000KN.
When magnesium alloy liquid pressure is full of the entirely mould cavity 10 of casting forging mould, 10 milliseconds are stopped, restarts casting forging hydraulic pressure
The forging and stamping oil cylinder of device, the piston rod 6 for forging and pressing oil cylinder promote forging and stamping 5 downlink of punch, carry out closed die forging, and forging force is controlled
For 8500KN, forging time control is 180 seconds, and forging and stamping Stroke Control is 0.3 millimeter.
Then forging is cooled to 380 DEG C, then starts forging and stamping oil cylinder and injection oil cylinder successively, exit forging and stamping punch 5
With injection punch head 16, restart die cylinder and separate moving-mould-core 8 and cover half core 9, restart the ejection in casting forging hydraulic device
Oil cylinder, the piston rod 12 of ejection cylinder promote mandril 11 to eject the forging of casting and forging molding, then take out forging by robot, obtain
To blank magnesium alloy seat basin skeleton or backrest frames；At the same time releasing agent, preparation cast next time are sprayed to moving-mould-core 8 and cover half core 9；
7 rivets are cast with the blank magnesium alloy seat basin skeleton and blank magnesium alloy backrest frames.
Then blank magnesium alloy seat basin skeleton or backrest frames are detected, defective work is subjected to reworked processing, closed
Lattice product are processed further；Specifically blank magnesium alloy seat basin skeleton or backrest frames are detected, will there is micropore or seam
The blank magnesium alloy seat basin skeleton or backrest frames of gap carry out reworked processing；Certified products are cooled down again, trimming, obtain just base magnesium and close
Golden seat basin skeleton or backrest frames.
Qualified first base magnesium alloy seat basin skeleton or backrest frames are stood by four-axle linked numer centre plus using indexing
Head and side milling head, all machining operations are completed in clamped one time, obtain smart base magnesium alloy seat basin skeleton or backrest frames.
Smart base magnesium alloy seat basin skeleton and smart base magnesium alloy backrest frames are stitched together and be fixed in rivet hot frock, is used
Rivet rod is heated to 680 DEG C by high-frequency induction formula principle of heating, then rivet rod rotation is dropped to proper height by smart base magnesium alloy seat
7 rivet rotary rivetings shaping on basin skeleton, afterwards turns over workpiece, by 7 on the smart base magnesium alloy backrest frames on opposite, a rivet
Revolve riveting shaping.
Smart base magnesium alloy seat basin skeleton or backrest frames are subjected to cleaning showers, carried out clearly except degreasing, then with ultrasonic wave
Wash；Smart base magnesium alloy seat basin skeleton or backrest frames are inserted in the electrolyte that voltage is 380V again and handled 12 minutes, makes the differential of the arc
Oxidation film layer is up to 13 μm；Then electrophoretic coating processing is carried out again after carrying out cleaning showers in the outer surface of micro-arc oxidation films；Then
Cured after cleaning again, solidification temperature is 180 DEG C, hardening time 18min, obtains magnesium alloy seat basin skeleton or by spine
Frame.
Embodiment 2.
Moving-mould-core 8 is installed on the dynamic model frame 4 of casting forging hydraulic device, cover half core 9 is installed on casting forging hydraulic device
In model frame 7；Restart the die cylinder of casting forging hydraulic device, promote moved cross beam to drive 8 downward stroke of moving-mould-core, with cover half
Core 9 is molded；The mould cavity 10 after molding is evacuated again, mould cavity 10 is become vacuum cavity, and make vacuum
0.5 Pa of vacuum ＞ and≤0.6Pa in cavity.
National standard AZ91D magnesium ingots are preheated into 25min at 200 DEG C at a temperature of first, then 25min is preheated at a temperature of 425 DEG C,
And keep the temperature；Then raw material magnesium alloy block is fused into liquid magnesium alloy at a temperature of 680 DEG C and kept the temperature.
The lanthanide rare intermediate alloy of 2% parts by weight is added in liquid magnesium alloy, then carrying out being sufficiently stirred makes mixing equal
It is even, magnesium alloy liquid pressure is obtained, gas shield insulation is then carried out at a temperature of 670 DEG C.
Magnesium alloy liquid pressure cast is entered into injection barrel 15, by the temperature control of magnesium alloy liquid pressure is 670 DEG C during cast；So
Start the injection oil cylinder in four orientation in casting forging hydraulic device afterwards, the piston rod 17 of injection oil cylinder promotes four injection devices 14
In injection punch head 16 advance at the same time from four direction, by magnesium alloy liquid pressure injection inject casting forging mould vacuum cavity in, and
Shaping, the punch injection speed control of magnesium alloy liquid pressure is 197 mm/seconds, and the control of injection power is 2110KN.
When magnesium alloy liquid pressure is full of the entirely mould cavity 10 of casting forging mould, 12 milliseconds are stopped, restarts casting forging hydraulic pressure
The forging and stamping oil cylinder of device, the piston rod 6 for forging and pressing oil cylinder promote forging and stamping 5 downlink of punch, carry out closed die forging, and forging force is controlled
For 9000KN, forging time control is 195 seconds, and forging and stamping Stroke Control is 0.9 millimeter.
Then forging is cooled to 390 DEG C, then starts forging and stamping oil cylinder and injection oil cylinder successively, exit forging and stamping punch 5
With injection punch head 16, restart die cylinder and separate moving-mould-core 8 and cover half core 9, restart the ejection in casting forging hydraulic device
Oil cylinder, the piston rod 17 of ejection cylinder promote mandril 11 to eject the forging of casting and forging molding, then take out forging by robot, obtain
To blank magnesium alloy seat basin skeleton or backrest frames；At the same time releasing agent, preparation cast next time are sprayed to moving-mould-core 8 and cover half core 9；
8 rivets are cast with the blank magnesium alloy seat basin skeleton and blank magnesium alloy backrest frames.
Then blank magnesium alloy seat basin skeleton or backrest frames are detected, defective work is subjected to reworked processing, closed
Lattice product are processed further；Specifically blank magnesium alloy seat basin skeleton or backrest frames are detected, will there is micropore or seam
The blank magnesium alloy seat basin skeleton or backrest frames of gap carry out reworked processing；Certified products are cooled down again, trimming, obtain just base magnesium and close
Golden seat basin skeleton or backrest frames.
Qualified first base magnesium alloy seat basin skeleton or backrest frames are stood by 5-shaft linkage numerical control center plus using indexing
Head and side milling head, all machining operations are completed in clamped one time, obtain smart base magnesium alloy seat basin skeleton or backrest frames.
Smart base magnesium alloy seat basin skeleton and smart base magnesium alloy backrest frames are stitched together and be fixed in rivet hot frock, is used
Rivet rod is heated to 680 DEG C by high-frequency induction formula principle of heating, then rivet rod rotation is dropped to proper height by smart base magnesium alloy seat
8 rivet rotary rivetings shaping on basin skeleton, afterwards turns over workpiece, by 9 rivets on the smart base magnesium alloy backrest frames on opposite
Revolve riveting shaping.
Smart base magnesium alloy seat basin skeleton or backrest frames are subjected to cleaning showers, carried out clearly except degreasing, then with ultrasonic wave
Wash；Smart base magnesium alloy seat basin skeleton or backrest frames are inserted in the electrolyte that voltage is 400V again and handled 10 minutes, makes the differential of the arc
Oxidation film layer is up to 15 μm；Then electrophoretic coating processing is carried out again after carrying out cleaning showers in the outer surface of micro-arc oxidation films；Then
Cured after cleaning again, solidification temperature is 190 DEG C, hardening time 20min, obtains magnesium alloy seat basin skeleton or by spine
Frame.
Embodiment 3.
Moving-mould-core 8 is installed on the dynamic model frame 4 of casting forging hydraulic device, cover half core 9 is installed on casting forging hydraulic device
In model frame 7；Restart the die cylinder of casting forging hydraulic device, promote moved cross beam to drive 8 downward stroke of moving-mould-core, with cover half
Core 9 is molded；Restart vacuum exhauster 18 mould cavity 10 after molding is evacuated, mould cavity 10 is become true
Absolutely empty chamber, and make 0.2 Pa of vacuum ＞ and≤0.5Pa in vacuum cavity.
National standard AZ91D magnesium ingots are preheated into 30min at 210 DEG C at a temperature of first, then 30min is preheated at a temperature of 450 DEG C,
And keep the temperature；Then raw material magnesium alloy block is melted and kept the temperature at a temperature of 690 DEG C.
2% lanthanide rare intermediate alloy is added in liquid magnesium alloy according to parts by weight, then be sufficiently stirred making mixing
Uniformly, magnesium alloy liquid pressure is obtained, gas shield insulation is then carried out at a temperature of 675 DEG C.
Magnesium alloy liquid pressure cast is entered into injection barrel 15, by the temperature control of magnesium alloy liquid pressure is 675 DEG C during cast；So
Start the injection oil cylinder in four orientation in casting forging hydraulic device afterwards, the piston rod 17 of injection oil cylinder promotes four injection devices 14
In injection punch head 16 advance at the same time from four direction, by magnesium alloy liquid pressure injection inject casting forging mould vacuum cavity in, and
Shaping, the punch injection speed control of magnesium alloy liquid pressure is 215 mm/seconds, and the control of injection power is 2200KN.
When magnesium alloy liquid pressure is full of the entirely mould cavity 10 of casting forging mould, 80 milliseconds are stopped, restarts casting forging hydraulic pressure
The forging and stamping oil cylinder of device, the piston rod 6 for forging and pressing oil cylinder promote forging and stamping punch downlink, carry out closed die forging, and forging force is controlled
For 9500KN, forging time control is 220 seconds, and forging and stamping Stroke Control is 1.8 millimeters.
Then forging is cooled to 400 DEG C, then starts forging and stamping oil cylinder and injection oil cylinder successively, exit forging and stamping punch 5
With injection punch head 16, restart die cylinder and separate moving-mould-core 8 and cover half core 9, restart the ejection in casting forging hydraulic device
Oil cylinder, the piston rod 12 of ejection cylinder promote mandril 11 to eject the object of casting and forging molding, then take out forging by robot, obtain
To blank magnesium alloy seat basin skeleton or backrest frames；At the same time releasing agent, preparation cast next time are sprayed to moving-mould-core 8 and cover half core 9；
9 rivets are cast with the blank magnesium alloy seat basin skeleton and blank magnesium alloy backrest frames.
Then blank magnesium alloy seat basin skeleton or backrest frames are detected, defective work is subjected to reworked processing, closed
Lattice product are processed further；Specifically blank magnesium alloy seat basin skeleton or backrest frames are detected, will there is micropore or seam
The blank magnesium alloy seat basin skeleton or backrest frames of gap carry out reworked processing；Certified products are cooled down again, trimming, obtain just base magnesium and close
Golden seat basin skeleton or backrest frames.
Qualified first base magnesium alloy seat basin skeleton or backrest frames are stood by 5-shaft linkage numerical control center plus using indexing
Head and side milling head, all machining operations are completed in clamped one time, obtain smart base magnesium alloy seat basin skeleton or backrest frames.
Smart base magnesium alloy seat basin skeleton and smart base magnesium alloy backrest frames are stitched together and be fixed in rivet hot frock, is used
Rivet rod is heated to 680 DEG C by high-frequency induction formula principle of heating, then rivet rod rotation is dropped to proper height by smart base magnesium alloy seat
9 rivet rotary rivetings shaping on basin skeleton, afterwards turns over workpiece, by 9 rivets on the smart base magnesium alloy backrest frames on opposite
Revolve riveting shaping.
Smart base magnesium alloy seat basin skeleton or backrest frames are subjected to cleaning showers, carried out clearly except degreasing, then with ultrasonic wave
Wash；Smart base magnesium alloy seat basin skeleton or backrest frames are inserted in the electrolyte that voltage is 420V again and handled 8 minutes, makes differential of the arc oxygen
Change film layer up to 16 μm；Then polishing treatment of dusting is carried out again after carrying out cleaning showers in the outer surface of micro-arc oxidation films；Then again
Cured after cleaning, solidification temperature is 200 DEG C, hardening time 22min, obtains magnesium alloy seat basin skeleton or backrest frames.
Claims (10)
1. the production technology of overall magnesium alloy chair framework, the chair framework include integral seat basin skeleton and integral back bone
Frame, the production technology includes instrument preparation, material preparation, joint control casting is forged, linkage is refined and surface treatment workshop section, its feature exist
Include batch mixing in material preparation workshop section, the batch mixing is added according to parts by weight in liquid magnesium alloy among 2% lanthanide rare
Alloy.
2. the production technology of entirety magnesium alloy chair framework according to claim 1, it is characterised in that the joint control casting forging
Workshop section includes cast, vacuum injection, delay casting forging and mould unloading step, wherein：
The cast step is that magnesium alloy liquid pressure cast is entered injection barrel；
The vacuum injection step is that magnesium alloy liquid pressure injection is injected into casting forging mould vacuum cavity；
The delay swaging step is when magnesium alloy liquid pressure is full of the entirely mould cavity of casting forging mould, is slightly stopped, then
Forged；
The mould unloading step is to cool down forging, opens mould, takes out forging, obtains blank magnesium alloy chair framework；
Several rivets are cast with the blank magnesium alloy chair framework.
3. the production technology of entirety magnesium alloy chair framework according to claim 2, it is characterised in that the joint control casting forging
The specific method of workshop section is：Magnesium alloy liquid pressure cast is entered into injection barrel, when cast exists the temperature control of magnesium alloy liquid pressure
In the range of 665-675 DEG C；Then start the injection oil cylinder in four orientation in casting forging hydraulic device, promote in four injection devices
Injection punch head advance at the same time from four direction, magnesium alloy liquid pressure injection is injected in the vacuum cavity of casting forging mould, and is molded；
The punch injection speed of magnesium alloy liquid pressure is controlled in the range of 185-215 meter per seconds, injection power is controlled in 2000-2200KN models
In enclosing；When magnesium alloy liquid pressure is full of the entirely mould cavity of casting forging mould, 10-80 milliseconds are stopped；Restart casting forging hydraulic pressure dress
The forging and stamping oil cylinder put, promotes forging and stamping punch downlink, carries out closed die forging, and by forging force control in 8500-9500KN, forging
Between control at 180-220 second, forge and press Stroke Control at 0-1.8 millimeters；Forging is cooled to 380-400 DEG C again, Ran Houyi
It is secondary to start forging and stamping oil cylinder and injection oil cylinder, forging and stamping punch and injection punch head are exited, restarts die cylinder by moving-mould-core and cover half
Core separates, and restarts the ejection cylinder in casting forging hydraulic device, promotes mandril to eject the forging of casting and forging molding, then take out forging
Part, obtains blank magnesium alloy chair framework.
4. the production technology of entirety magnesium alloy chair framework according to claim 3, it is characterised in that the vacuum injection
The injection power used in step is 2110N；The delay residence time used in the delay swaging step is 12 milliseconds, forging force
For 9000KN.
5. the production technology of the overall magnesium alloy chair framework according to any one in claim 1-4, it is characterised in that
The instrument preparation workshop section includes making casting forging mould step and die-filling step；Wherein：
The forging mould of casting is made of moving-mould-core and cover half core, and the casting forging mould step that makes is to make moving-mould-core first and determine
Core rod, and cause the mould cavity shape that is formed after the molding of the moving-mould-core and cover half core and the seat basin skeleton in chair framework or
The global shape of person's backrest frames is identical；
The die-filling step is installed on moving-mould-core on the dynamic model frame of casting forging hydraulic device, and cover half core is installed on casting forging hydraulic pressure
In the model frame of device；Restart the die cylinder of casting forging hydraulic device, promote moved cross beam, drive moving-mould-core downward stroke,
Molded with cover half core；The mould cavity formed after molding is evacuated again, mould cavity is become vacuum cavity, and
Make vacuum≤0.6Pa in vacuum cavity.
6. the production technology of entirety magnesium alloy chair framework according to claim 5, it is characterised in that the material preparation
Workshop section further includes preheating, melt and batch mixing step, wherein：
The preheating step is that raw material magnesium alloy block is preheated 20-30min at 190-210 DEG C at a temperature of first, then in 400-
20-30min is preheated at a temperature of 450 DEG C, and is kept the temperature；
The melt step is that raw material magnesium alloy block is melted and protected at a temperature of 670-690 DEG C using solvent-free gas shield
Temperature；
The batch mixing is after lanthanide rare intermediate alloy is added be sufficiently stirred making to be uniformly mixed, and obtains magnesium alloy liquid pressure,
Then gas shield insulation is carried out at a temperature of 665-675 DEG C.
7. the production technology of entirety magnesium alloy chair framework according to claim 6, it is characterised in that the linkage is refined
Workshop section includes detection, trimming and linkage motion cutting step, wherein：
The detecting step is that blank magnesium alloy chair framework is detected, and will have the blank magnesium alloy seat of micropore or gap
Skeleton carries out reworked processing, and certified products are processed further；
The trimming process is to cool down certified products, trimming, obtains just base magnesium alloy chair framework；
The linkage motion cutting step is that qualified first base magnesium alloy chair framework is passed through four axis or 5-shaft linkage numerical control center
Stand plus all machining operations are completed in clamped one time using dividing head and side milling head, obtain smart base magnesium alloy seat bone
Frame.
8. the production technology of entirety magnesium alloy chair framework according to claim 7, it is characterised in that the linkage is refined
Workshop section further includes rivet hot, and the rivet hot is that smart base magnesium alloy seat basin skeleton and smart base magnesium alloy backrest frames are stitched together admittedly
It is scheduled in rivet hot frock, rivet rod is heated to 680 DEG C with high-frequency induction formula principle of heating, then rivet rod rotation is dropped into suitable height
Rivet rotary riveting on smart base magnesium alloy seat basin skeleton is molded by degree, afterwards turns over workpiece, the smart base magnesium alloy on opposite is leaned on spine
The riveting of frame rivet rotary is molded.
9. the production technology of entirety magnesium alloy chair framework according to claim 8, it is characterised in that the surface treatment
Workshop section includes cleaning, differential arc oxidation and external coating step, wherein：
The cleaning step is that smart base magnesium alloy chair framework is carried out cleaning showers, is carried out clearly except degreasing, then with ultrasonic wave
Wash；
The differential arc oxidation step is to insert smart base magnesium alloy chair framework in micro-arc oxidation electrolyte, carries out surface by micro-arc oxygen
Change is handled；Differential arc oxidation is specifically carried out in the electrolyte that voltage is 380V-420V to handle 8-12min minutes, makes differential of the arc oxygen
Change film layer and reach 13-17 μm；
The external coating step is to carry out electrophoretic coating again after carrying out cleaning showers in the outer surface of micro-arc oxidation films or dust
Polishing treatment；Then cured after cleaning again, solidification temperature is 180-200 DEG C, hardening time 18-22min, obtains magnesium conjunction
Golden chair framework.
10. a kind of casting forging hydraulic device for producing blank magnesium alloy chair framework, the casting forging hydraulic device are equipped with dynamic model, determine
Mould, vacuum pumping hardware and injection mechanism；The dynamic model includes the dynamic model frame being fixed on the moved cross beam of casting forging hydraulic device
With the forging and stamping punch for being arranged on dynamic model outer frame centre of surface, top and the work of the forging and stamping oil cylinder of casting forging hydraulic device of punch are forged and pressed
Stopper rod connects, and the cover half includes the model frame being arranged on the workbench of casting forging hydraulic device, it is characterised in that the dynamic model
Moving-mould-core is provided with frame, cover half core is equipped with the model frame；The moving-mould-core after cover half core molding with forming mould
Cavity, the mould cavity shape are identical with the seat basin skeleton in chair framework or the shape difference of backrest frames；The cover half
Frame and cover half in-core are provided with mobilizable mandril, and the mandril is connected with the piston rod of the ejection cylinder of casting forging hydraulic device；
The vacuum pumping hardware includes vacuum exhauster, Vacuum exhaust tube and vacuum door close, and the vacuum exhauster is installed on work
Make on platform, the Vacuum exhaust tube connects mould cavity and vacuum exhauster, the vacuum closure with cover half core through model frame
Door is arranged in mould cavity wall；The vacuum door close is arranged in mould cavity wall；The top of the forging and stamping punch is equipped with
0-1.8 millimeters of forging and stamping stroke；The injection mechanism includes four sets of injection devices, and four sets of injection devices are separately positioned on model frame
Four sides, the injection device includes injection barrel and the injection punch head that is arranged in injection barrel, the injection barrel
One end be connected with mould cavity, one end of the injection punch head and the piston rod of the injection oil cylinder of casting forging hydraulic device connect
Connect.
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| CN109622835A (en) * | 2018-11-26 | 2019-04-16 | 昆明理工大学 | A kind of casting forging of Model For The Bush-axle Type Parts is compounded to form device |
| CN110241318A (en) * | 2019-07-12 | 2019-09-17 | 苏州标图高级座椅有限公司 | High-speed rail seat skeleton preparation process with high accuracy |
| CN111715863A (en) * | 2020-07-01 | 2020-09-29 | 深圳市北工实业有限公司 | Extrusion casting and micro-forging integrated forming method and die casting system |
| CN112171190A (en) * | 2020-09-18 | 2021-01-05 | 山东华盛荣镁业科技有限公司 | Magnesium-based seat privacy cover and preparation process thereof |
| CN112695360A (en) * | 2020-12-11 | 2021-04-23 | 苏州龙宇精密机械有限公司 | Surface treatment method for precision parts of aviation seat |
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| CN112171190A (en) * | 2020-09-18 | 2021-01-05 | 山东华盛荣镁业科技有限公司 | Magnesium-based seat privacy cover and preparation process thereof |
| CN112695360A (en) * | 2020-12-11 | 2021-04-23 | 苏州龙宇精密机械有限公司 | Surface treatment method for precision parts of aviation seat |
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